Closing die or bell for welded tubes



D. W. CHISHOLM.

CLOSING DIE 0R BELL FOB WELDED' TUBES..

APPLICATION FILED SEPT. 30, I919.

Patented Sept. 21, 1920.

UNITED: stares PATENT QF'FICE.

nouenns wHIMsTEn oHIsHoL-M, or GARNKIRK, scornnnnf cLosING DIE on BELLFOR WELDED TUBES.

I Application filed September 30, 1919. Serial No. 327,452.

Toallwkomitmaycoqwem:, i I

Be it lmown that I,'DoUGLAs WHIMSTER' CHISHOLM, of Woodhead, Garnkirk,Lanark shire, Scotland, a subject of the King of Great Britain, haveinvented a certain new and useful Improved Closing Die or Bell for vWelded Tubes, of which the following is a fitted in the usual frame anda heated skelp or strip drawn the bell cool..

In order that the invention may beclearly understood I have hereuntoappended an explanatory sheet of drawings whereon I haveshown', by wayof example, one mode of constructing the improved die or bell.'.

Figure 1 is a side elevationof the bell.

Fig. 2 is a cross section taken on the line 40-00 Fig. 1, and looking inthe direction of the arrow.

Fig. 3 is a longitudinal section.

The improved bell, as shown, is made, as usual, with a conic bell parta, bore 1), and lugs 0, and cast in one with the bell part are side,bottom and back walls (1 which constitute an open trough or casing ofrectangular shape as shown. Owing to the conic bell through it the waterkeeps part being smaller than the trough a space e is left around thebell. I

Whenthe bell is dipped into the water Specification of Letters Patent.Patented Spt, 21, I920.

tank as usual the space e is filled, more or less, and, when the bell isdropped into place in the usual frame or housing on the draw.

bench the water f in the space keeps the bell cool and prevents it beingburned.

The lugs a form extensions on the side walls of the trough.

. a Having now fully described my invention;

what I claim and desire to secure by Letters Patent is I 1. A closingdie or hell for use in the manufacture of butt welded and lap weldedtubes having, integral therewith, an open trough or casing for thereception of water forcooling purposes.

2. A....cl0sing die or bell for use in the manufacture of butt weldedand lap weld-- ed tubes having walls integral with the die or bell andwhlchconstitute an open casing or trough for the reception of water,substantially as described. I

3. A closing die or bell for use in the manufacture of butt welded andlap welded tubes having a rectangular upstanding wall 1 whichconstitutes an open casing or trough for the reception of water,substantially as described. p l 4. A closing die or bell for use in themanufacture of butt welded and lap welded tubes having a rectangularupstanding wall springing from the sides and back of the die or bell andwhich constitutes an open casing or trough 'for the reception of water,substantially as described f In testimony whereof I afiix my signaturein presence of two witnesses. i

I Witnesses:

MARY GREEN, I CLARA MoI-IIAFFIn.

DOUGLAS WHI'MSTER. GHISHOLM.

